Analysis

  • max time kernel
    118s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    31-12-2021 11:09

General

  • Target

    enjoin,12.27.2021.doc

  • Size

    77KB

  • MD5

    7044bd240219ec2f83b01c532e2ce5ba

  • SHA1

    745cdbc4a826c5960eef3f4a9aa307ff94e4b7fb

  • SHA256

    ecd84fa8d836d5057149b2b3a048d75004ca1a1377fcf2f5e67374af3a1161a0

  • SHA512

    8467fc9f63711c8fa460f1f35d42b6528c6e285799d9a19630696dd3a12e24799370eaa6d53e075e60d579a3b4ecef035cf62aac6a1bc96130b392c3931882ee

Score
10/10

Malware Config

Signatures

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Blocklisted process makes network request 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Office loads VBA resources, possible macro or embedded object present
  • Modifies Internet Explorer settings 1 TTPs 32 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\enjoin,12.27.2021.doc"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:812
    • C:\Windows\SysWOW64\explorer.exe
      explorer i7Gigabyte.hta
      2⤵
      • Process spawned unexpected child process
      PID:112
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:964
    • C:\Windows\explorer.exe
      C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:1776
      • C:\Windows\SysWOW64\mshta.exe
        "C:\Windows\SysWOW64\mshta.exe" "C:\Users\Admin\Documents\i7Gigabyte.hta"
        2⤵
        • Blocklisted process makes network request
        • Modifies Internet Explorer settings
        • Suspicious use of WriteProcessMemory
        PID:1120
        • C:\Windows\SysWOW64\regsvr32.exe
          "C:\Windows\System32\regsvr32.exe" c:\users\public\gigabyteI7.jpg
          3⤵
            PID:1376

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Defense Evasion

      Modify Registry

      1
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\Documents\i7Gigabyte.hta
        MD5

        fbdb7848f1d9945428c0101b75811195

        SHA1

        fe31e65196e0844cd5858f893d44428aece6a2b4

        SHA256

        aec91c78c4dc06c5bcea7b5020c38b003fc120153d51a3adb4f32d8000a6326a

        SHA512

        d699d3a8123f7fcc09373f27f0a09015546abe6bcfbeb8a75178b9ef0304f73c19bc0f27f51ed2b78a02a8caee89b5e268808e6c0aa981ed011fe03c573311a5

      • \??\c:\users\public\gigabyteI7.jpg
        MD5

        d3eb9513a9f2dd24ecdcc38ff33ca41b

        SHA1

        37433c7bfdb800c601fcba6f055bd01a87d26333

        SHA256

        56591a120bd1c7d012554befd923d1ac7bf015a53a36c2808766f74fbfdceb64

        SHA512

        67960feec5eda119383b9955dbd36550ce804ef1fd01f0e4d9afc347068ca54be4b89913af2cc872e25c119318cbe3e137a4965e4a5a09231afe960c1e2b844b

      • memory/112-58-0x0000000000000000-mapping.dmp
      • memory/112-60-0x000000006B0F1000-0x000000006B0F3000-memory.dmp
        Filesize

        8KB

      • memory/812-55-0x000000006FEA1000-0x000000006FEA3000-memory.dmp
        Filesize

        8KB

      • memory/812-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
        Filesize

        64KB

      • memory/812-57-0x0000000075F21000-0x0000000075F23000-memory.dmp
        Filesize

        8KB

      • memory/812-70-0x000000005FFF0000-0x0000000060000000-memory.dmp
        Filesize

        64KB

      • memory/812-54-0x0000000072421000-0x0000000072424000-memory.dmp
        Filesize

        12KB

      • memory/964-68-0x0000000000000000-mapping.dmp
      • memory/1120-63-0x0000000000000000-mapping.dmp
      • memory/1376-64-0x0000000000000000-mapping.dmp
      • memory/1376-67-0x0000000000300000-0x0000000000301000-memory.dmp
        Filesize

        4KB

      • memory/1776-61-0x000007FEFB931000-0x000007FEFB933000-memory.dmp
        Filesize

        8KB